Limekiln



GRISCOM & DENN.

Lima Kiln.

Patented Nov. 17, 1857.

NITED STATES PATENT OFFICE.

POWELL GRISGOM AND CHARLES S. DENN, OB BALTIMORE, MARYLAND.

LIMEKILN.

Specification of Letters Patent N0. 18,635, dated November 17, 1857.

T0 all whom vlt may concern:

Be it known that we, POWELL GRISCOM ancl C. S. DENN, 0f Baltimore, in the State of Maryland, have invented a new and useful Improvernents in Limekilns; and we clo bereby declare that the following is a full, clear, and exact description 0f the same, reference being had t0 the accompanying drawings, forrning part 0f this specification, in Which Figure l, is an external front view 0f a lime kiln constructecl with our improvements. Fig. 2, is a plan 0f the Same. Fig. 3, is a vert-ical transverse sect-ion in the line w, x, in Fig. G. Fig. 4, is a vcrtical longi tudinal sect-ion in the line y, y, in Fig. 2. Fig. 5, is a vertical longitudinal section in the line 2, 2, in Fig. 2. Fig. 6, is a plan view of the base cf the kiln ancl inverted vievvs 0f the sides 0f the sarne.

The nature of our invention consists in an arrangement, embracing, f0r unitecl operation, as hereinafter set forth, the f0ll0\\ ing several peculiar features t0 wit: 1st. The inverted oblong pyra1niclal lime basin in the base 0f tl1e kiln, having discharge ancl clcaring passages. 2ncl. The fire grates and ash pits extencling from fr0nt 130 back of basin, on each of the oblong sirles of the sarne, but dividecl by central partitions. 3rcl. The pyra1nidic burning stack with a chalnber of oblong quadrilateral form at its base, and gradually running int0 an oval forma as lt terminates, ancl having fire cha1nbers Which extend from front t0 back, but are clivided at center by partitions, and having also lateral fiame and hotair passages leading directly int0 the chamber 0f the pyramiclic stack, along the whole wi lth 0f the quaclrilateral portion 0f tl1e burning chamber.

By the applicat-ion of the furnaces in the manner above stated the fi1e is brought in closer and m 0re immecliate contact with tl1e lime stone contained in the pyramidic stack than by any ot-her modc of applying them, and by the transverse partition Walls in the ccnter 0f each furnace, the Wind is prevented from blowing trough the furnaccs, that is from blovving in at the doors and ash pits 0n one sicle and clriving tl1e blaze through doors and ash pits on the ot-her,

ancl by the quaclrilateral ancl oval f011n 0f tl1e stack and basin a greater surface 0f st0nc is brought in direct contact withthe fire than Wibh a stack cf circular 01 square form, without increasing the diameter of said stack, owing to the flame from one fire having buta "ery narrow space 01' thin Wall 0f lime stone to circulatc througl1 before meeting the flame from the other chamber, at the center of the stack, and thus cvery ortion of the stone can be acted upon by the heat. This is important, for if the diameter of the stack be too great, the stone in the center Will either not be burned into lime 01 the length 0f time that it Will take to burn it Will be so great tl1at that portion first n1et by the fla1ne Will be burncd t00 mach and ruined, and finally by having the burning cha1nber taper gradually f101n basc to top, ancl t0 change fr01n a quadrilateral form at its base t0 an oval form asit ter1ni nates a concentration 01 an equal distribution cf the draft 01 l1eat tl1rough the stone, without at all projecting the Walls over tl1e furnace, is cfl"ectccl, and thus the even settling of tl1e contcnts is facilitated. Tl1is also is quite important.

T0 enable others skilled in the art t0 make and use 0111 invention, we Will proceecl to describe its construction and operation.

A, represents the base of the kiln. It is 1nade of quadrilateral form.

B, is the central basin which receivcs Ehe manufacturecl lin1e and discharges it at one of the sicles of tl1e kiln through a lateral assage C. This basin in forn1 resen1bles an inverted pyramicl Wih two of its sicles nearly clouble the length 0f tl1c others. It ismade thus so that the furnaces 1nay be brought ncarer the ccnter 0f the kiln with out clecreasing the capacity cf the stack, and so extenclccl fr01n back t0 front 0f the san1e as t0 hcat the whole mass throughout.

D, D, are the grates and E, E, the ash pits of the furnaces. They extencl, as ust stated,

from front to back of the kiln, but are diviclecl at the center 0f their length by partiti0ns F, F, so that the draft shall not blow in ab the ash pit and doors 0n one side ancl thorugh cl00rs and asl1 pits 011 the other.

G, rep1esents the stack of t-he kiln. It has a cl1a1nbcr a, b, f01 containing the lin1e stone which is macle 0f quadrilaceral form at its basc b, and graclually tapcring and running into an oval fo1n1 ab its apex a. This chamber is also 0f oblong for1n so as t0 correspond with the for1n of tl1e basin. This stack has the fire cha1nbers H, I, formed in its base, said cha1nbers extending from front to back of t-l1e kiln but being divided by partitions F, F, just as the ash pits and grates are divided. at the center, and for the Same purpose, viz: preventing the blowing of the draft entirely through the furnaces. The inner sich o, 0f each 0f the fire chambers H, I, is made of open grating so that the fiame am]. heat may attack the stone along the whole length of the burning chamber with a powerful and direct action, this being also aided materially by having the exposed sides of the partitions F, F, form inclined planes which eoncentrate the draft aus it asses tothe furnaces.

I, I, are draft flues, K, L, M, door openings, N, N, clearing .or eking holes provided in the base und stack of the kiln.

We deem it proper before stating our claim to remark that the partitions F, F, which render the peculiarly consoructed ki1n herein described practicable and available to This specification 0f our improvement in.

lime kilns signed by us this 30th day of September, 1857.

POWELL GRISCOM. CHARLES s. DENN.

Witnesses:

J OI-IN BOND, SAM. E. GRISCOM. v 

